a(n) = 1 + Sum_{k=0..n-1} k^3 * a(k) * a(n-1-k).
A385841
a(n) = 1 + Sum_{k=0..n-1} k^3 * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =18a(4) =505a(5) =32857a(6) =4141211a(7) =898723027a(8) =309170208201
External references
- oeis: A385841
A385841
a(n) = 1 + Sum_{k=0..n-1} k^3 * a(k) * a(n-1-k).